Five-year-old Wilbur performs on an intelligence test at a level characteristic of an average 4-year-old. Wilbur's mental age is

Name: Five-year-old Wilbur performs on an intelligence test at a level characteristic of an average 4-year-old. Wilbur's mental age is
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Wilbur's mental age is 4 because his performance on the intelligence test is characteristic of an average 4-year-old, indicating his mental capabilities are similar to those of a 4-year-old.

Five-Year-Old Wilbur Performs on an Intelligence Test at a Level